1987 mercury 40 hp 402, 2 cylinder, water not making it to the tattle tale, plugged

Ronwanda

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Joined
Jun 1, 2015
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I changed impeller as earlier owner over heated the motor. Motor was leaking water near top spark plug hole. I put new gasket and its not leaking there. Fires up with lots of compression. I checked water jacket plug and water there. Water is not making it through to the tattle tale. I blew into it and not plugged. Any suggestions.
 
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